Ophthalmic mounting.



F. A. STEVENS.

OPHTHALNHC MOUNTING.

APPLICATION HLED DEC. 3. 19H}.

1,293,232, Patented Feb. 4, 1919.

.ZFzvenZor/ WQAM fliiorne y/ STATES PATENT OFFICE.

FREDERICK A. STEVENS, OF PROVIDENCE, RHODE ISLAND, ASSIGNOB TO STEVENS AND COMPANY, INCORPORATED, A CORPORATION OF RHODE ISLAND.

OPHTHALMIC MOUNTING.

Specification of Letters Patent.

Patented Feb. 4, 1919.

Application filed December 3, 1918. Serial No. 265,189.

To all whom it may concern Be it known that I, FREDERICK A. 'S'IIEVENS, citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in O hthalmic Mountings, of which the following is a specification.

My invention relates to that cla ss of mountings in which an auxiliary rim is employed.

The principal ob ects of my nvention are to provide an inexpensive and efficient means for assembling the auxiliary rim to the skeleton rim and for securely retaining the assembled parts while in use; and to attain these ends in a non-expensive structure.

To the above ends essentially my invention consists of such parts and combinations of. parts as fall within the scope of the appended claims.

In the accompanying drawings which form a part of this invention, and where n like reference characters indicate like parts throughout the views;

Figure 1 is a rear elevation of a pair of spectacles embodying my invent on,

Fig. 2, a plan view of the original spectacle skeleton,

Fig. 3, an enlarged section on bus 3-3 of Fig. 2,

Fig. 4, a rear elevation of an auxiliary rim before bending.

Fig. 5, a section on line 5-5 of Fig. 4,

Fig. 6, a section on line 6-6 of F1 1, and

Fig. 7, a similar section of a modi ed form of eye wire best adapted for eyeglasses.

My invention in its illustrated embodiment is applied to a spectacle frame. The skeleton of the latter comprises the bridge 8 fast to the central portions of the wires 9 which are intended for subsequent bending into circular rims. This stage of construction is shown in Fig 2. .The wires 9 are substantially flat or oblong in cross section. Each wire is provided intermediate its width on one face with a longitudinal rib 11 preferably acute angular in cross section. One

face 12 of the rib is vertical, and the other face 13 is inclined.

In constructing spectacles the runs are first applied to the wires. The rims, 1n the Y present instance consisting of two sections 15, are preferably composed of zylonite, celluloid, Or other non-metallic material. One such section is shown in Fig. 4. This is provided in its rear side with a longitudinall disposed rectangular oblon slot 17 extening beyond the center of t e rim dividing the same into wings or sections 18 and 19. Extending into the wing 18 from the slot 17 is an annular recess 21, an lar in cross section, bounded by a vertica wall 22 and an inclined wall '23. In the outer face of the win or tongue 19 is an annular groove 25, pre erably V shaped in cross section.

The wires 9 and rims 15 are bent into circular form before receiving the lenses 27, whose margins enter the grooves 25. Each section 15 has notches 29 and 30 at the ends of the wing 19 to accommodate end pieces 31 soldered or otherwise fixed to the ends of the wires 9. The end pieces 31 are attached together by screws or pins 33; and the temple 35 are connected as usual.

The parts are assembled, after the rims and wires have been bent into circular form, thus. Each annular metallic rim 9 is inserted edgewise or laterally into the slot 17 of the annular rim. The resiliency of the section 19 is sufficient to permit the rib 11, which is being forced into the slot, to pass into its seat 21; whereu on the section 19 returns to its natural osition. The inclined face 13 of the rib 11 acilitates introduction of the wire, while the face 12 tends to prevent escape of the latter.

Introduction ma be facilitated b shaping the wire 9 as s own in Fig. 7. hat is, one lateral margin 35 is reduced, as at 35, so that its inclined .upper surfaw 36 merges into the surface 13.

The foregoing description is directed solely toward the construction illustrated, but I reserve the privilege of resorting to all the mechanical changes to which the dea 2. In an ophthalmic mo 1nting, the cognhinetion of e non-metallic rim provid with an annular slot extendiglfin trensverselv a me'or portion of the thi ease of the r m, am with an internal annular recess opening into the slot, and with an external ennule ,r groove ade ted (embrace a lens, a. metallic rim seated in the slot, and en annular I'll) on the second rim registering 1n the recess. 8. In an ophthalmic mounting, the combination of a non-metallic rim provided with an annular slot extending transversely of the rim, and with an internal recess opening into the slot, and with an externel groove, a. lens seated in the groove, metalllc rim seated in the slot, and a rib on the metallic rim registering in the 4. In an ophthalmic mounting, the combinetion of a non-metallic rim provided with an annular slot extending transversely of the nm a major portion of its depth, and with an annular recess mute angular in cross section opening into the slot, and with an external annular groove, a rim seated in the slot, a lens in the groove, and an .annuler acute angular rib on the second rib register-.

in in the recess.

n testimony whereof I have afiixed my signature.

FREDERICK A. STEVENS. 

